<template>
  <view>
    <view class="search-box">
      <uni-search-bar @input="input" :radius="100" placeholder="请输入搜索内容" cancelButton="none" :focus="true"></uni-search-bar>
    </view>
    <!-- 搜索建议列表 -->
    <view class="sugg-list" v-if="kw.length!==0">
      <view class="sugg-item" v-for="(item,i) in searchResults" :key="i" @click="gotoDetail(item)">
        <view class="goods-name">{{item.goods_name}}</view>
        <uni-icons type="arrowright" size="16"></uni-icons>
      </view>
    </view>
    <!-- 搜索历史区 -->
    <view class="history-box" v-else>
      <!-- 标题区 -->
      <view class="history-title">
        <text>搜索历史</text>
        <uni-icons type="trash" size="17" @click="clean"></uni-icons>
      </view>
      <!-- 列表区 -->
      <view class="history-list">
        <uni-tag :text="item" v-for="(item,i) in histories
        " :key="i" @click="gotoGoodsList(item)"></uni-tag>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    onLoad() {
    this.historyList = JSON.parse( uni.getStorageSync('kw') || '[]')
    },
    data() {
      return {
        showSync:true,
        timer:null,
        kw:'',
        //搜索的结果列表
        searchResults:[],
        //搜索历史的数组
        historyList:[]
      };
    },
    methods:{
      //input输入事件
      input(e){
        clearTimeout(this.timer)
       this.timer= setTimeout(()=>{
          // console.log(e)
          this.kw = e
          this.getSearchList()
        },500)
      },
     async getSearchList(){
        //判断搜索关键字是否为空
        if(this.kw.length === 0){
          this.searchResults = []
          return
        }
       const {data:res}=await uni.$http.get('/api/public/v1/goods/qsearch',{query:this.kw})
       if(res.meta.status !==200) return uni.$showMsg()
       this.searchResults = res.message
       this.saveSearchHistory()
      },
      gotoDetail(item){
        uni.navigateTo({
          url:'../goods_detail/goods_detail?goods_id=' + item.goods_id
        })
      },
      saveSearchHistory(){
        // this.historyList.push(this.kw)
        const set = new Set(this.historyList)
        set.delete(this.kw)
        set.add(this.kw)
        this.historyList = Array.from(set)
        //把搜索记录存储到本地存储
        uni.setStorageSync('kw',JSON.stringify(this.historyList))
      },
      clean(){
        this.historyList = []
       // uni.clearStorageSync()
       uni.removeStorageSync('kw')
      },
      gotoGoodsList(kw){
        uni.navigateTo({
          url:'/subpkg/goods_list/goods_list?query=' + kw
        })
      }
    },
    computed:{
      histories(){
      return  [...this.historyList].reverse()
      }
    } 
  }
</script>

<style lang="scss">
.uni-searchbar{
  background-color: #C00000 !important;
}
.search-box{
  position: sticky;
  top: 0;
  z-index: 999;
}


.sugg-list{
  padding: 0 5px;
  .sugg-item{
    display: flex;
    align-items: center;
    justify-content: space-around;
    font-size: 12px;
    padding: 13px 0;
    border: 1px solid #efefef;
    .goods-name{
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
      margin-right: 3px;
    }
  }
}
.history-box{
  padding: 0 5px;
  .history-title{
    display: flex;
    justify-content: space-between;
    height:40px;
    align-items: center;
    font-size: 13px;
    border-bottom: 1px solid #efefef;
      }
  .history-list{
    display: flex;
    flex-wrap: wrap;
    
    .uni-tag{
      display: block;
      margin-top: 5px;
      margin-right: 5px;
    }
  }
}
</style>
